2eighTZ4me Posted November 7, 2008 Share Posted November 7, 2008 OK - finally got the beast started last night. I have an Aeromotive FPR that appears to not be working. (AER-13204) No matter how I adjust the screw, in or out (gone to both extremes) - I get 13psi of pressure. This is killing the carbs - won't barely idle and doesn't rev at all. If I turn off the fuel pump, it continues to stumble for about 5 seconds and then runs like a champ until it dries up the bowls. I've tried with and without the vacuum hose connected, I've tried ported and non-ported vacuum - all to no avail. Adjusting the screw does absolutely nothing. My fuel pressure gauge is right off the outlet of the FPR, so I see exactly what is going to the carbs. (Note in the top of the picture). The unit is brand new. Is there a possibility that it could be bad? I know I've got it hooked up properly according to the instructions. This is a "bypass" type system and not a deadhead system. The pump is an Aeromotive 14psi carbureted pump. AEI-11203. The regulator says "to be able to use your EFI pump with a carburetor". I was told by Summit Racing, that this regulator will work fine with a carbureted pump. I bought this regulator because it goes down to 3psi. I have read on this site that Mikuni's need about 4psi. The carbureted regulator starts at 5psi. Any ideas? Quote Link to comment Share on other sites More sharing options...
PalmettoZ Posted November 7, 2008 Share Posted November 7, 2008 OK - finally got the beast started last night. I have an Aeromotive FPR that appears to not be working. (AER-13204) No matter how I adjust the screw, in or out (gone to both extremes) - I get 13psi of pressure. This is killing the carbs - won't barely idle and doesn't rev at all. If I turn off the fuel pump, it continues to stumble for about 5 seconds and then runs like a champ until it dries up the bowls. I've tried with and without the vacuum hose connected, I've tried ported and non-ported vacuum - all to no avail. Adjusting the screw does absolutely nothing. My fuel pressure gauge is right off the outlet of the FPR, so I see exactly what is going to the carbs. (Note in the top of the picture). The unit is brand new. Is there a possibility that it could be bad? I know I've got it hooked up properly according to the instructions. This is a "bypass" type system and not a deadhead system. The pump is an Aeromotive 14psi carbureted pump. AEI-11203. The regulator says "to be able to use your EFI pump with a carburetor". I was told by Summit Racing, that this regulator will work fine with a carbureted pump. I bought this regulator because it goes down to 3psi. I have read on this site that Mikuni's need about 4psi. The carbureted regulator starts at 5psi. Any ideas? Hey- Do you have a return line from the regulator that goes back to the tank ? Otherwise it won't work correctly and you cannot control the pressure. Quote Link to comment Share on other sites More sharing options...
2eighTZ4me Posted November 7, 2008 Author Share Posted November 7, 2008 Yes - the return line is in place and working. The manual states it needs to be a -8 AN line all the way back to the tank, however, that was for an EFI pump. I have a -6 AN going back to the tank, and the pump is a low pressure pump for carbed motors. Quote Link to comment Share on other sites More sharing options...
rags Posted November 7, 2008 Share Posted November 7, 2008 Take the top of the regulator off by removing the perimeter screws and see if there is a tear in the diaphram or something keeping the valve from seating correctly. There really isn't anything to a FPR and once you open it you will see how it works. The two scenarios described above are the only twu reasons why it wouldn't work. Joe Quote Link to comment Share on other sites More sharing options...
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